Synthesis of stable aqueous dispersion of graphene/polyaniline composite mediated by polystyrene sulfonic acid

Abstract

A facile method of producing stable aqueous dispersion of graphene/polyaniline (PANI) composite is described, which involves the in situ polymerization of aniline on the surface of graphene with the aid of polystyrene sulfonic acid (PSS). The prepared aqueous graphene/PANI composite dispersion was very stable and no aggregation or precipitation was observed for several weeks. The excellent aqueous dispersibility and stability of the graphene/PANI composite is attributed to the cooperative interactions of p stacking interaction between PSS, PANI, and the graphene basal planes, and the electrostatic repulsions between negatively charged PSS bound on graphene/PANI composite. Fourier transform-infra-red spectrometry (FTIR), ultraviolet-visible spectra (UV-vis), and Raman spectra confirmed the interaction of PANI and graphene in the composite, which effectively delocalize the electrons. In addition, the composite showed three orders of magnitude of conductivity increase compared with pure PANI. This new approach is simple, fast, and straightforward, representing a significant improvement in the processing of graphene/PANI composites. V C 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 50: [4888][4889][4890][4891][4892][4893][4894] 2012

Preparation and thermoelectric properties of multi-walled carbon nanotubes/polypyrrole composites

“…When the MWCNT content is 15 wt%, the electrical conductivity reaches 72 S/cm. There are two main reasons for the increase of electrical conductivity after forming composite with MWCNTs: one is that the electrical conductivity of MWCNT is higher than the PPY matrix, and the MWCNT formed a conductive network; the other is that MWCNTs were used as a template to guide the self-assembly of PPy into more ordered crystalline alignments via the -interaction between PPy and MWCNT [31] during the processing.…”

Graphene nanosheets generated from sulfonated polystyrene/graphene nanocomposite

“…SPS nanoparticles can be either prepared by emulsion copolymerization of styrene and styrene sulfonated or sulfonating pre-formed polystyrene particles [27,28]. Although composites of PS with graphitic fillers are widely known in the literatures [29][30][31][32][33] but relatively lesser numbers of reports have used SPS and graphitic fillers to prepare new materials [34][35][36]. The stable aqueous dispersion of graphitic nanoplatelets coated with anionic polymer, poly(sodium 4-styrenesulfonate) (PSS), pioneered by Ruoff [34] has emerged as an ideal candidate for the development novel polymer composites [34][35][36].…”

“…Although composites of PS with graphitic fillers are widely known in the literatures [29][30][31][32][33] but relatively lesser numbers of reports have used SPS and graphitic fillers to prepare new materials [34][35][36]. The stable aqueous dispersion of graphitic nanoplatelets coated with anionic polymer, poly(sodium 4-styrenesulfonate) (PSS), pioneered by Ruoff [34] has emerged as an ideal candidate for the development novel polymer composites [34][35][36]. Recently, core-shell PS microspheres coated with GP sheets via p-p accumulation have been prepared to study their electrocatalytical and electrorehological properties [31][32][33].…”

Thin nanocomposite layers based on a complex of polyaniline and graphene

“…A rather laborious method of intro ducing graphene into PANI synthesized in the pres ence of a polymer sulfonic acid is presented in [6,7].…”

“…Of the nanocomposite materials for development of nanocomposites with PANI, graphene appears to be the most interesting material due to its possible inter action with the polymer [6][7][8]. Apart from such unique properties of graphene as its relatively large ordered surface, high mobility of charge carriers and high stability, it is a relatively cost effective material.…”